(1)0.35-10-(0.2+6.37÷0.7)×0.5

1个回答

  • (1)0.35-10-(0.2+6.37÷0.7)×0.5,

    =-9.65-(0.2+9.1)×0.5,

    =-9.65-9.3×0.5,

    =-9.65-4.65,

    =-(9.65+4.65),

    =-14.3;

    (2)91×

    1

    31 +9÷13-1÷13×100,

    =91×

    1

    31 +9×

    1

    13 -

    1

    13 ×100,

    =(91+9-100)×

    1

    13 ,

    =0×

    1

    13 ,

    =0;

    (3)(

    4

    51 -

    4

    71 )×17-

    3

    71 ,

    =

    4

    51 ×17-

    4

    71 ×17-

    3

    71 ,

    =

    4

    3 -(

    68

    71 +

    3

    71 ),

    =

    4

    3 -1,

    =

    1

    3 ;

    (4)53.5×1.9+61×1.25+41×8.1,

    =53.5×(2-0.1)+(60+1)×1.25+(40+1)×8.1,

    =53.5×2-53.5×0.1+60×1.25+1×1.25+40×8.1+1×8.1,

    =107-5.35+75+1.25+324+8.1,

    =(107+75+324)+(1.25-5.35+8.1),

    =506+4,

    =510;

    (5)12×[(

    1

    2 +

    1

    3 )÷

    5

    6 ],

    =12×[

    5

    6 ÷

    5

    6 ],

    =12×1,

    =12;

    (6)

    7

    9 ×

    14

    15 +56×

    1

    9 +

    1

    9 ×

    7

    15 ,

    =

    1

    9 ×7×

    14

    15 +56×

    1

    9 +

    1

    9 ×

    7

    15 ,

    =(

    98

    15 +56+

    7

    15 )×

    1

    9 ,

    =63×

    1

    9 ,

    =7.